1 D Kinematics

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14 Νοε 2013 (πριν από 3 χρόνια και 9 μήνες)

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1 D Kinematics

Making sense of the equations

Simplifications


1 Dimension

Motion in a straight line

Displacement is d in the equations

Most of the time, displacement and distance are the
same


t
i

=0

t
f



t
i

= t in the equations

If
t
i

is not 0, just use t =
t
f
-

t
i



Basic Equations

Basic

Constant
Velocity

v
i

= 0

Acceleration

a = (v
f
-
v
i
)/t

v
f

= v
i

a = 0

a = v
f
/t

Distance

d = v
i
t + ½ at
2

d = v t

d = ½ at
2

Velocity

v
f

= v
i

+ at

v= d/t

v
f

= at

Time

t = (v
f
-
v
i
)/a

t = d/v

t = v
f
/a

Advanced Equations


You don’t need to memorize these equations
but you need to know how to use them.


They are given to you on the MCAS formula
sheet. You can write them on your note card.


They make calculations easier and faster
depending on what information is given in the
problem.

Advanced Equations

Advanced

v
i

= 0

Acceleration

a = (v
f
2
-

v
i
2
)/2d

a = (v
f
2
)/2d

Distance

d = (v
f
2
-

v
i
2
)/2a

d = ½ at
2

Velocity

v
f
2
= v
i
2

+ 2ad

v
f
2

= 2 ad

Time

t = (2d/a)
½